Edw n adibon richmond



EDWIN ADISGN RICH MCDND IMPROVED PISTON RQD METAL RING PACK'I NO G LAND A SSIGMED Tu RIQHMOND aA/vATsW;

134mm) OCT 11 1879 L no.2

stern critter.

EDWIN ADISGN RICHMOND. OF SAN FRANCISCO, CALIFOBNIA,ASSIGNUR TU HIMSELF AND CHARLES WATSON. 0F SAME PLACE.

Letters Patent No. 108,188. dated October 11. 1870.

lMPRUl/EMENT IN PISTON-ROD PACKING.

The Ewchelole referred to in these Letters Patent and making part of the same To all whom. it may, concern:

Be it known that I, EDWIN Amsox ltrcnnosn, of the city and county of San Francisco and State of California, have inventeda certain new and improved PlSliOlldOd and Valve-rod lhletal-ring Packing-Gland; and I do hereby declare that the following is a full. clear, and exact description of the same, rcferenro being bad to the accompanying drawing and letters of reference marked thereon, making a part of this spec-, ification, in which- Figure 1 is a sectional elevation, and

Figure 2 is a plan of mydevice.

The invention is for the purpose of securing a perfectly steam and water-tight packing for workingrods of machines, such-as piston-rods of steam-engines and pumps, valve-rods, 85c.

There are parts of the device which have been in use before, my invention extending cmiy m w-mum it ditiona-l improvements.

To enable others skilled in the art to wake and use my invention, 1 will proceed to describe it, as follows:

In the old style of stalling boxes, in whiclfibrous packing is used, ill l'l is the stalling-box, aid the gland.

The gland is in one solid piccc, and is node to slide within the stalling or packing-box, by screwing up bolts, connecting their respective flanges together. When (he gland is pressed into tho packing-lion, the packing is iorced compactly against the rod, and thus a steam-tight joint is obtained.

For my improred metal-ring packing gland, there is a similar paclvingdmx, A, and also a gland, .B.

This gland is no longer adjustable in the box A, but is Slll"l{'ei not in the box, and remains there in one The rod 0 passes through the gland it, and at the upper and lower end of this gland there will be rcres as or chambers cut out, as at I) l), which recesses will contain the metal packing-i mgs.

These packing-rings are not of themselves new, for they are in common use to the knowledge of tho inventor below subscribed; however, they may be dc scribed as two rings, ouch being cut into three equal arc-shaped pieces.

One of the rings has an L-shapcd section, which may he called the outer ring, and the other ring, (the inner 011e,) has a squzu -v section, and iils within the recess of the outer l'lllg. lbis inner and smallcrring is set within the outer l..-shapcd ring, so that its cuitings orjoints will come about midway between the joints or cuttings in the outer ring, one ring-overlaptheir ends against the sides of the recess, (which they .in part occupy, bear with their center part; against the outer packing-ring, and press both inner and outer rings tightly against the rod, so that steanrmay not pass by them.

These packing-rings will be iuclosed in their respectirc chambers by caps or covers G G, nhich are secured over each end of the gland by tap-bolts, as

shown.

There was a patent, No. 37,653, granted to one .Tohn Johnson, in 1863, for a piston-rod packingsomewhat similar to mine, but his idea seems to ha e been toaisc steam to press forward the rings, and he only provides a single set of rings at the inner end of the gland.

There have been found to be disadvantages corn peered with Johnsons packing-gland, which 1 have endeavored to overcome. One of the most particular objections is, that the packing cannot be kept perfccl'ly tight, and frequently leaks steam, there not being suflicicnt be: ring in his single set of rings to properly pack the rod. It has also been my expel-b once that srcnm is not as effective as springs, to press forward the packing-rings; however, this is only a matter ofopiniou there are those who hold a different View.

I will not claim the peculiar style or shape of tho packing-rings used, nor the application of the springs to set forward the rings; nor will I claim a packingglaud wherein only one set of rings is used, in one end of the gland, for such a gland the above-named Johnson has produced; but

What I have found to be a \aluablc improvement on Johnsons gland, and

\Yhat I shall claim as my invention, and desire to secure by Letters Patent, is as follows:

As an improvement on Johnsous packing-gland, herein nui-ntioued, the application of an additional set of rings at the outer end of the gland, said rings be" log set up with springs, as shown, and to operate in combination with tluinner set of rings, as and for the purpose as set l'oriln I EDWIN ADISON RICHMOND. \Vitncsscs: 

